Water Pollution

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Water Pollution
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Objectives

• Recall what pollution indicators are.

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Starter

• Suggest 3 ways you would be able to tell that a
  river or lake is polluted.

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Which is polluted?
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Pollution Indicators

• Organisms can be used to show whether there is
  pollution in water or the air.

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Air Pollution Indicators

• Lichen are a combination of algae and fungus.
• They are susceptible to Sulfur Dioxide and do not
  grow in areas of high pollution.

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Water Pollution Indicators
Mayfly and Stonefly larvae are only found in
areas of clean water
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Water Pollution Indicators
Freshwater shrimp and Caddis fly larva may be
found in mildly polluted areas as well as clean
water.
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Water Pollution Indicators
Blood worms and water louse can be found in
polluted water.
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Water Pollution Indicators
Sludge worms and rat-tailed maggots can be found
in badly polluted water
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Water Pollution Indicators
No apparent life can be found in grossly polluted
water.
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Complete the activity
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Plenary

• Write two sentences
• The first which describes how lichen are used as
  air pollution indicators
• The second which describes how freshwater
  invertebrae are used as water pollution indicators